<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>动画制作</title>
</head>
<body>
    <div class="play-ground">
        <div class="ball"></div>
    </div>
    <style>
        body{
            background-image: url(./背景12.jpg);
            background-size: 100%;
        }
        .play-ground{
            width: 600px;
            height: 300px;
            border: 1px solid rgb(176, 71, 71);
            position: relative;
            margin-left: 700px;
        }
        .ball{
            background: rgb(66, 174, 237);
            border-radius: 50%;
            position: absolute;
            animation: ball 7s infinite ease-in-out;
            margin-left: 20px;
        }
        @keyframes ball{
            from{
                width: 50px;
                height: 50px;
                left:30px;
                top: 130px;
            }
            24%{
               width: 25px;
               height: 25px;
               left: 130px;
               top: 20px;
            }
            50%{
                width: 100px;
                height: 100px;
                left: 240px;
                top: 100px;
            }
            73%{
                width: 100px;
                height: 100px;
                left: 360px;
                top: 200px;
            }
            100%{
                width: 150px;
                height: 150px;
                left: 420px;
                top: 70px;
            }
        }
    </style>
</body>
</html>